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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| S.W.M. Corporation | Revere, MA | — | Septage Hauler | 2128 |
| Samuel Ruggiano | Swanton, VT | — | Designer | — |
| Schofields Septic Tank Service, Inc. | Lisbon, NH | — | Septage Hauler | 460 |
| Scott Davis | West Burke, VT | — | Designer | — |
| Scott Homsted | Colchester, VT | — | Designer | — |
| Scott Silverstein | Richmond, VT | — | Designer | — |
| Scott Smith | Huntington, VT | — | Designer | — |
| Septic Pro Llc | Keene, NH | — | Septage Hauler | 925 |
| Seth Goddard | Colchester, VT | — | Designer | — |
| Shane Clark | Saint Johnsbury, VT | — | Designer | — |
| Shane Mullen | Waterbury, VT | — | Designer | — |
| Shannon Larocque | St Johnsbury, VT | — | Designer | — |
| Shawn Spiewak | Waterbury, VT | — | Designer | — |
| Sheri Young | Orwell, VT | — | Designer | — |
| Sj Transportation Co. Inc | Woodstown, NJ | Salem | Septage Hauler | 449 |
| Spencer Harris | Bristol, VT | — | Designer | — |
| Stearns Septic Service, Llc | Grantham, NH | — | Septage Hauler | 644 |
| Stephen Diglio | Bolton Valley, VT | — | Designer | — |
| Stephen Pro | Brattleboro, VT | — | Designer | — |
| Stephen Revell | Lincoln, VT | — | Designer | — |
| Stephen Tetreault | Saint Albans, VT | — | Designer | — |
| Steve'S Septic Service, Llc | Vernon, VT | — | Septage Hauler | 479 |
| Steven Palmer | Hinesburg, VT | — | Designer | — |
| Stone Industries, Llc | Saratoga Springs, NY | — | Septage Hauler | 846 |
| Stones' Septic Llc | Swanzey, NH | — | Septage Hauler | 2597 |
| Sun Environmental Corp. | Liverpool, NY | — | Septage Hauler | 2605 |
| Suzanne Pickett | Randolph Center, VT | — | Designer | — |
| Sylvester'S Trucking Llc | Richford, VT | — | Septage Hauler | 1072 |
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